Wire.



PATENTED MAY 30, 1905.

W. HOOPES.

WIRE.

APPLICATION FILED JAN. 26, 1904.

n I I I l I I I l 1 I l l I l l l h l 1 I l I I l l ll INVENTOR W W IWITNESSES [5M find/mg UNITED STATES Patented May 30, 1905.

PATENT OFFICE.

WILLIAM HOOPES, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURGHREDUCTION COMPANY, OF NEWV KEN SINGTON PENN SYLVANIA, A CORPORATION OFPENNSYLVANIA.

WIRE.

SPECIFICATION forming part of Letters Patent No. 791,096, dated May 30,1905.

Application filed January 26, 1904- Serial No. 190,710.

To all whom it may concern:

Be it known that I, WILLIAM HooPEs, of Pittsburg, Allegheny county,Pennsylvania, have invented anew and useful Improvement in Wire, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 shows in plan view, partly in section,a rod or ingot from which my improved wire is made in accordance with myinvention. Fig. 2 is a vertical cross-section on the line II II of Fig.1.

The purpose of my invention is to provide a wire which shall afford thestrength and resistance to cross fracture which is afforded by astranded cable, but which shall be free from the objections to whichcables are subject.

In the drawings, 2 represents the central core of a compound rod oringot constructed in accordance with my invention, and 3 4: 5 areconcentric tubular layers of the same material. The rod or ingot soconstituted by placing the several tubes and core together when cold orby casting them concentrically without welding throughout their lengthis then rolled and drawn to the form of wire of the desired size. Bythus makingacompound wire consisting of a series of concentric layersunwelded together liability of breakage due to crystallization isremoved because the laminated wire will not vibrate with the readinesswith which a solid wire vibrates, and if crystallization happens tostart at any point of the cross-section of the wire it can only spreadto the limits of the lamination in which it begins. By laminating thewire in this way I secure greater flexibility and greater tensilestrength than could be obtained in solid wire of the same material andarea of cross-section, and I secure greater reliability by confining theeffect of any imperfections to a small portion of the section of thewire.

It is important that the method of manufacture of the wire should besuch that the several laminae will not weld together, since the weldingof the laminae in an electric conductor would defeat to a great extentthe ad vantages which my invention affords.

I am aware that tubes have been drawn one upon the other and thatbimetallic wires have been made by placing a steel core in.a copper-wireingot and rolling and drawing both together; but I believe it to be newto make a laminated wire in which adjacent laminae are of the samematerial and are unweldcd to each other.

I do not desire to limit myself to the mode of manufacture of theoriginal ingot or bar from which the wire is rolled and drawn, all thatis essential being that it shall be composed of concentric laminae ofthe same material not welded together.

I claim 1. As a new article of manufacture, a wire composed of separateconcentric laminae of the same material in contact with each other;substantially as described.

2. As a new article of manufacture, a wire composed of a core covered byseparate, closely-fitting laminae of the same material; substantially asdescribed.

In testimony whereof I have hereunto set my hand.

WILLIAM I-IOOPES.

Witnesses;

THouAs W. BAKEWELL, Gno. B. BLEMING.

